I want to get the current standard epoch time (seconds from 1970) in a nsh script. Is there any way to do that as date +%s is not working in nsh? Or maybe you have an ideea of how can I convert something like this 2012-04-18-17-09-25 to epoch time in nsh.

if it’s 4.0.4 you can goto the NSH/bin directory and change the nsh symlink to point to the zsh-4_3_4 binary instead of zsh. 4.3.4 is the default for bsa 8.1+ and it works fine in older versions for the most part.